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sequence of numbers

From: Jan Pruner <jan_at_pruner.cz>
Date: Mon, 19 Nov 2001 04:01:53 -0800
Message-ID: <F001.003C85B7.20011119034017@fatcity.com>

Hello,

        I've a table mt ( mt1 NUMBER(10) NOT NULL ) with unique index on the mt1 column.
There's a sequence of numbers 1,2,3,4,6,7,8,10,11 ... in the mt1

Now, I want to get the smallest number which is not in mt1
(excluding min(mt1)-x of course) into XY (in my example is it n. 5).

When I use SELECT MIN(mt1)-1 INTO XY FROM MT WHERE MT1 NOT IN (select mt1+1 from mt)
my perfromance goes pretty down :-))) (there's about 5 mil. of numbers).

Some idea how to get it without cursor?

Thanks (and sorry it's monday)
JP

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Author: Jan Pruner
  INET: jan_at_pruner.cz

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Received on Mon Nov 19 2001 - 06:01:53 CST

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